Assistant Referee Lee Probert holds a watch linked to the Hawkeye system before the English Premier League soccer match between Liverpool and Stoke City at Anfield in Liverpool, northern England, on August 17.

A text message saying "goal" sent to the referee's watch will end disputes over whether the ball has crossed the line in the English Premier League this season. Dubbed Goal Decision System (GDS) and developed by British company Hawk-Eye, the system promises to give referees a ruling within a second, their watch buzzing to tell them when a ball has gone in. Reuters/Darren Staples